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72576Re: Crash with regexp

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  • Marcin Szamotulski
    Aug 1 7:32 AM
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      On 16:27 Thu 01 Aug , Bram Moolenaar wrote:
      >
      > Marcin Szamotulski wrote:
      >
      > > On 06:28 Mon 29 Jul , Marcin Szamotulski wrote:
      > > > On 22:07 Sun 28 Jul , Bram Moolenaar wrote:
      > > > >
      > > > > Marcin Szamotulski wrote:
      > > > >
      > > > > > Vim crashes with the following pattern:
      > > > > >
      > > > > > \%(\%(\|\d\|-\|\.\)*\|\*\)
      > > > > >
      > > > > > And it does not crash with
      > > > > >
      > > > > > \%(\%(\d\|-\|\.\)*\|\*\)
      > > > > >
      > > > > > It is part of a pattern that matches package (the part matches the
      > > > > > version number) inside:
      > > > > >
      > > > > > sys-kernel/gentoo-sources-3.6.11
      > > > > >
      > > > > > I am not sure why I put "\(\|" inside the pattern, but vim (with -u
      > > > > > NONE) crashes when searching for that pattern in a file which contains
      > > > > > the above example.
      > > > >
      > > > > I can easily reproduce it, unfortunately.
      > > > >
      > > > > --
      > > > > How To Keep A Healthy Level Of Insanity:
      > > > > 17. When the money comes out the ATM, scream "I won!, I won! 3rd
      > > > > time this week!!!!!"
      > > > >
      > > > > /// Bram Moolenaar -- Bram@... -- http://www.Moolenaar.net \\\
      > > > > /// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
      > > > > \\\ an exciting new programming language -- http://www.Zimbu.org ///
      > > > > \\\ help me help AIDS victims -- http://ICCF-Holland.org ///
      > > >
      > > > This is a simpler pattern that crashes vim:
      > > >
      > > > \%(\%(\|a\)*\)
      > > >
      > > > but
      > > >
      > > > \(\(\|a\)*\)
      > > >
      > > > works fine. Also
      > > >
      > > > \%(\(\|a\)*\)
      > > >
      > > > works fine but
      > > >
      > > > \(\%(\|a\)*\)
      > > >
      > > > crashes. So there is some problem with the inner \%(\) group.
      > > >
      > > > Best regards,
      > > > Marcin
      > >
      > > Today a user of my plugin reported that vim crashes and this is due to
      > > a similar problem. Now vim crashes with this pattern:
      > >
      > > {\%([^{}]*\|{\%([^{}]\)*}\)*}
      > >
      > > but changing only the outer \%(...\) to \(...\) fixes the problem. This
      > > pattern matches what is inside {...} but also will match { {....} },
      > > i.e when another {...} is embedded.
      >
      > Patch 7.4b.002 changes these kind of things. I could also make it crash
      > with \%(\)*.
      >
      > There was another problem that went unnoticed that only happened for
      > \(\) after the fix and there was only a test for \%(\). So hopefully
      > all similar cases are solved now.
      >
      > --
      > hundred-and-one symptoms of being an internet addict:
      > 36. You miss more than five meals a week downloading the latest games from
      > Apogee.
      >
      > /// Bram Moolenaar -- Bram@... -- http://www.Moolenaar.net \\\
      > /// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
      > \\\ an exciting new programming language -- http://www.Zimbu.org ///
      > \\\ help me help AIDS victims -- http://ICCF-Holland.org ///


      Thanks, indeed it fixed the issues.

      Best regards,
      Marcin

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